4 ohm dvc wiring

Your best bet is to wire one woofer to each channel of the amp.  Each channel will see a 2 ohm load, which your amp can handle.  Wire each woofer as follows and connect one to each channel of the amp.

Option 1 (parallel) = 2 ohm load Voice coils wired in parallel Recommended Amplifier: Stable at 2 or 1 ohm mono

Your amp has only one channel.  There are 2 sets of speaker outputs on the amp, but the 2 positives are connected together.  Same for the 2 negative terminals.  They do this for ease of connectivity to your speakers.  Why are you saying it is not 1 ohm stable?  Does it have writing near the speaker terminals that says 2Ohm and 2Ohm by the other set of terminals?  If so, they are telling you that you can connect 2 ohms worth of drivers to each set of terminals on the amp.  2 Ohm paralleled along with another 2 Ohm load will yield a 1 Ohm load.  I think that amp is 1 Ohm stable.  If you have documentation that states otherwise, go with that info.  If you are going by the writing by the speaker terminals and they say 2 ohms on each set, the amp is 1 ohm stable.

If it is only stable down to 2, use the following diagram.

Option 2 (series/parallel) = 4 ohm load Voice coils wired in series, speakers wired in parallel Recommended Amplifier: Stable at 4, 2, or 1 ohm mono

If it is stable down to 1 Ohm you can use the following diagram.

Option 1 (parallel/parallel) = 1 ohm load Voice coils wired in parallel, speakers wired in parallel Recommended Amplifier: Stable at 1 ohm mono